docker 镜像的制作

一、镜像

1.打包

root@localhost \~\]# systemctl start docker \[root@localhost \~\]# docker save -o centos.tar centos:latest \[root@localhost \~\]# ls anaconda-ks.cfg centos.tar ### 2.传输 \[root@localhost \~\]# scp centos.tar root@192.168.1.100:/root ### 3.删除镜像 \[root@localhost \~\]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE centos latest 5d0da3dc9764 2 years ago 231MB \[root@localhost \~\]# docker start c0 //启动容器 c0 \[root@localhost \~\]# docker attach c0 //进入容器 \[root@207ca7680ecc /\]# exit exit \[root@localhost \~\]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES \[root@localhost \~\]# docker ps --all //查看全部 CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 207ca7680ecc centos:latest "/bin/bash" 20 hours ago Exited (0) 4 seconds ago c0 \[root@localhost \~\]# docker rmi centos:latest //这里看到没有删掉，因为有容器正在使用 Error response from daemon: conflict: unable to remove repository reference "centos:latest" (must force) - container 207ca7680ecc is using its referenced image 5d0da3dc9764 \[root@localhost \~\]# docker rm c0 //删除容器 c0 \[root@localhost \~\]# docker ps --all CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES \[root@localhost \~\]# docker rmi centos:latest //成功删除 Untagged: centos:latest Untagged: centos@sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177 Deleted: sha256:5d0da3dc976460b72c77d94c8a1ad043720b0416bfc16c52c45d4847e53fadb6 Deleted: sha256:74ddd0ec08fa43d09f32636ba91a0a3053b02cb4627c35051aff89f853606b59 \[root@localhost \~\]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE ### 4.导入到本地目录 \[root@localhost \~\]# docker load -i centos.tar 74ddd0ec08fa: Loading layer \[================================================== \>\] 238.6MB/238.6MB Loaded image: centos:latest \[root@localhost \~\]# docker image ls //这里看到已经导入成功了 REPOSITORY TAG IMAGE ID CREATED SIZE centos latest 5d0da3dc9764 2 years ago 231MB ## 二、容器导出镜像（导出一个有yum源的镜像） ### 1.有yum源的 \[root@localhost \~\]# docker run -it --name=c0 centos:latest /bin/bas //创建并启动服务 配置yum源 \[root@70f41b63c128 /\]# rm -rf /etc/yum.repos.d/\* \[root@70f41b63c128 /\]# curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo \[root@70f41b63c128 /\]# yum clean all \&\& yum makecache \[root@70f41b63c128 /\]#yum -y install epel-release ctrl+p+q退出 \[root@localhost \~\]# docker ps --all CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 70f41b63c128 centos:latest "/bin/bash" 8 minutes ago Up 8 minutes c0 \[root@localhost \~\]# docker export -o centos_yum.tar c0 //导出tar \[root@localhost \~\]# ls anaconda-ks.cfg centos.tar centos_yum.tar \[root@localhost \~\]# docker import -m yum centos_yum.tar centos:yum //导入为镜像 sha256:9d43e5c9d7e41b8ed7ec287ad1cde2e56297808cab66618e25f25b6962b869fa \[root@localhost \~\]# docker image ls //生成了新的镜像 REPOSITORY TAG IMAGE ID CREATED SIZE centos yum 9d43e5c9d7e4 About a minute ago 260MB centos latest 5d0da3dc9764 2 years ago 231MB ### 2.有httpd的 \[root@localhost \~\]# docker run -it --name c100 centos:yum /bin/bash \[root@1fe0d666d8b9 /\]# yum -y install httpd 退出 \[root@localhost \~\]# docker export -o centos_httpd.tar c100 \[root@localhost \~\]# ls anaconda-ks.cfg centos_httpd.tar centos.tar centos_yum.tar \[root@localhost \~\]# docker import -m httpd centos_httpd.tar centos:httpd \[root@localhost \~\]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE centos httpd 55b1539d5cd6 About an hour ago 309MB centos yum 9d43e5c9d7e4 4 hours ago 260MB centos latest 5d0da3dc9764 2 years ago 231MB ## 三、IP地址 查看ip ### 1.进入容器，安装net-tools或iproute，直接使用命令ifconfig \[root@6e9839616992 /\]# yum -y install net-tools \[root@6e9839616992 /\]# ifconfig \[root@6e9839616992 /\]# yum -y install iproute \[root@6e9839616992 /\]# ip a s ### 2.在外面使用docker指令inspect \[root@localhost \~\]# docker inspect c100 \[root@localhost \~\]# docker inspect centos:httpd ### 3.在外部调用指令 \[root@localhost \~\]# docker exec c100 ip a s \[root@localhost \~\]# docker exec c100 ifconfig ### 4.使用exec创建一个文件 \[root@localhost \~\]# docker exec c100 touch /root/tdr.txt \[root@localhost \~\]# docker attach c100 \[root@6e9839616992 /\]# ls /root anaconda-ks.cfg anaconda-post.log original-ks.cfg tdr.txt ## 四、虚拟机端口映射 ### 1.将容器中的80端口映射到宿主机的80端口 \[root@localhost \~\]# docker stop c100 c101 //停用容器 c100 c101 \[root@localhost \~\]# docker rm c100 c101 //删除容器 c100 c101 \[root@localhost \~\]# docker run -it --name c0 -p80:80/tcp centos:httpd /bin/bash //创建启动并映射端口，将容器中的80端口映射给宿主机的80端口，前面是宿主机的端口，后面是容器的端口 \[root@1fe0d666d8b9 /\]# httpd -k start \[root@1fe0d666d8b9 /\]# echo "tdr" \> /usr/share/httpd/noindex/index.html ctrl+p+q退出 \[root@localhost \~\]# curl localhost //宿主机访问，没做端口映射之前就是可以访问的 tdr 去真机浏览器访问虚拟机IP：192.168.1.76 //没做端口映射之前不能访问，现在可以了 ### 2.随机的为容器指定映射端口，映射端口\>=32768 \[root@localhost \~\]# docker ps --all CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 1fe0d666d8b9 centos:httpd "/bin/bash" 19 minutes ago Up 19 minutes 0.0.0.0:80-\>80/tcp, :::80-\>80/tcp c0 \[root@localhost \~\]# docker stop c0 //停止 c0 \[root@localhost \~\]# docker rm c0 //删除 c0 \[root@localhost \~\]# docker run -it --name c1 -p80 centos:httpd /bin/bash //这里只有80，是容器的80端口 \[root@dce0e427f4d6 /\]# httpd -k start \[root@dce0e427f4d6 /\]# curl localhost i am tdr ctrl+p+q退出 \[root@localhost \~\]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES dce0e427f4d6 centos:httpd "/bin/bash" About a minute ago Up About a minute 0.0.0.0:32768-\>80/tcp, :::32768-\>80/tcp c1 \[root@localhost \~\]# curl 192.168.1.76:32768 i am tdr 去真机浏览器访问虚拟机IP：192.168.1.76:32768 ### 3.通过其他的IP地址的端口映射容器的端口 \[root@localhost \~\]# ifconfig ens33:0 192.168.1.77 broadcast 192.168.1.77 netmask 255.255.255.255 up \[root@localhost \~\]# docker run -it --name c0 -p192.168.1.77::80 centos:httpd /bin/bash \[root@1775f9c8e015 /\]# httpd -k start \[root@1775f9c8e015 /\]# curl localhost i am tdr ctrl+p+q退出 \[root@localhost \~\]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 1775f9c8e015 centos:httpd "/bin/bash" About a minute ago Up About a minute 192.168.1.77:32769-\>80/tcp c0 dce0e427f4d6 centos:httpd "/bin/bash" 17 minutes ago Up 17 minutes 0.0.0.0:32768-\>80/tcp, :::32768-\>80/tcp c1 \[root@localhost \~\]# curl 192.168.1.77:32769 i am tdr 去真机浏览器访问虚拟机IP：192.168.1.77:32769